<template>
    <nav class="relative w-full flex flex-wrap items-center justify-center px-2 pb-2.5 sm:px-4">
        <div class="flex flex-1 justify-start">
            <router-link class="flex items-center text-3xl font-bold font-sans" :to="homePagePath"
                ><img
                    alt="logo"
                    src="/img/icons/logo.svg"
                    height="32"
                    width="32"
                    class="mr-[-0.6rem] w-10"
                />iped</router-link
            >
        </div>
        <div class="search-container lt-md:hidden">
            <input
                ref="videoSearch"
                v-model="searchText"
                class="input h-10 w-72 pr-20"
                type="text"
                role="search"
                :title="$t('actions.search')"
                :placeholder="$t('actions.search')"
                @keyup="onKeyUp"
                @keypress="onKeyPress"
                @focus="onInputFocus"
                @blur="onInputBlur"
            />
            <span v-if="searchText" class="delete-search" @click="searchText = ''">⨉</span>
        </div>
        <button id="search-btn" class="input btn mx-1 h-10" @click="onSearchClick">
            <div class="i-fa6-solid:magnifying-glass"></div>
        </button>
        <!-- three vertical lines for toggling the hamburger menu on mobile -->
        <button class="mr-3 flex flex-col justify-end md:hidden" @click="showTopNav = !showTopNav">
            <span class="line"></span>
            <span class="line"></span>
            <span class="line"></span>
        </button>
        <!-- navigation bar for large screen devices -->
        <ul class="md:text-1xl hidden list-none md:(flex flex flex-1 justify-end children:pl-3)">
            <li v-if="shouldShowTrending">
                <router-link v-t="'titles.trending'" to="/trending" class="nav-link" />
            </li>
            <li>
                <router-link v-t="'titles.preferences'" to="/preferences" class="nav-link" />
            </li>
            <li v-if="shouldShowLogin">
                <router-link v-t="'titles.login'" to="/login" class="nav-link" />
            </li>
            <li v-if="shouldShowRegister">
                <router-link v-t="'titles.register'" to="/register" class="nav-link" />
            </li>
            <li v-if="shouldShowHistory">
                <router-link v-t="'titles.history'" to="/history" class="nav-link" />
            </li>
            <li>
                <router-link v-t="'titles.playlists'" to="/playlists" class="nav-link" />
            </li>
            <li v-if="!shouldShowTrending">
                <router-link v-t="'titles.feed'" to="/feed" class="nav-link" />
            </li>
        </ul>
    </nav>
    <!-- navigation bar for mobile devices -->
    <div
        v-if="showTopNav"
        class="mobile-nav mb-4 flex flex-col children:(w-full flex items-center gap-1 border-b border-dark-100 p-1)"
    >
        <router-link v-if="shouldShowTrending" to="/trending">
            <div class="i-fa6-solid:fire"></div>
            <i18n-t keypath="titles.trending"></i18n-t>
        </router-link>
        <router-link to="/preferences">
            <div class="i-fa6-solid:gear"></div>
            <i18n-t keypath="titles.preferences"></i18n-t>
        </router-link>
        <router-link v-if="shouldShowLogin" to="/login">
            <div class="i-fa6-solid:user"></div>
            <i18n-t keypath="titles.login"></i18n-t>
        </router-link>
        <router-link v-if="shouldShowLogin" to="/register">
            <div class="i-fa6-solid:user-plus"></div>
            <i18n-t keypath="titles.register"></i18n-t>
        </router-link>
        <router-link v-if="shouldShowHistory" to="/history">
            <div class="i-fa6-solid:clock-rotate-left"></div>
            <i18n-t keypath="titles.history"></i18n-t>
        </router-link>
        <router-link to="/playlists">
            <div class="i-fa6-solid:list"></div>
            <i18n-t keypath="titles.playlists"></i18n-t>
        </router-link>
        <router-link v-if="!shouldShowTrending" to="/feed">
            <div class="i-fa6-solid:play"></div>
            <i18n-t keypath="titles.feed"></i18n-t>
        </router-link>
    </div>
    <!-- search suggestions for mobile devices -->
    <div class="search-container mb-2 w-full md:hidden">
        <input
            v-model="searchText"
            class="input h-10 w-full"
            type="text"
            role="search"
            :title="$t('actions.search')"
            :placeholder="$t('actions.search')"
            @keyup="onKeyUp"
            @keypress="onKeyPress"
            @focus="onInputFocus"
            @blur="onInputBlur"
        />
        <span v-if="searchText" class="delete-search" @click="searchText = ''">⨉</span>
    </div>
    <SearchSuggestions
        v-show="(searchText || showSearchHistory) && suggestionsVisible"
        ref="searchSuggestions"
        :search-text="searchText"
        @searchchange="onSearchTextChange"
    />
</template>

<script>
import SearchSuggestions from "./SearchSuggestions.vue";
import hotkeys from "hotkeys-js";
export default {
    components: {
        SearchSuggestions,
    },
    data() {
        return {
            searchText: "",
            suggestionsVisible: false,
            showTopNav: false,
            homePagePath: import.meta.env.BASE_URL,
            registrationDisabled: false,
        };
    },
    computed: {
        shouldShowLogin(_this) {
            return _this.getAuthToken() == null;
        },
        shouldShowRegister(_this) {
            return _this.registrationDisabled == false ? _this.shouldShowLogin : false;
        },
        shouldShowHistory(_this) {
            return _this.getPreferenceBoolean("watchHistory", false);
        },
        shouldShowTrending(_this) {
            return _this.getPreferenceString("homepage", "trending") != "trending";
        },
        showSearchHistory(_this) {
            return _this.getPreferenceBoolean("searchHistory", false) && localStorage.getItem("search_history");
        },
    },
    watch: {
        $route() {
            this.updateSearchTextFromURLSearchParams();
        },
    },
    mounted() {
        this.fetchAuthConfig();
        this.updateSearchTextFromURLSearchParams();
        this.focusOnSearchBar();
        this.homePagePath = this.getHomePage(this);
    },
    methods: {
        updateSearchTextFromURLSearchParams() {
            const query = new URLSearchParams(window.location.search).get("search_query");
            if (query) this.onSearchTextChange(query);
        },
        // focus on search bar when Ctrl+k is pressed
        focusOnSearchBar() {
            hotkeys("ctrl+k", event => {
                event.preventDefault();
                this.$refs.videoSearch.focus();
            });
        },
        onKeyUp(e) {
            if (e.key === "ArrowUp" || e.key === "ArrowDown") {
                e.preventDefault();
            }
            this.$refs.searchSuggestions.onKeyUp(e);
        },
        onKeyPress(e) {
            if (e.key === "Enter") {
                this.submitSearch(e);
            }
        },
        onInputFocus() {
            if (this.showSearchHistory) this.$refs.searchSuggestions.refreshSuggestions();
            this.suggestionsVisible = true;
        },
        onInputBlur() {
            // the search suggestions will be hidden after some seconds
            // otherwise anchor links won't work!
            setTimeout(() => (this.suggestionsVisible = false), 200);
        },
        onSearchTextChange(searchText) {
            this.searchText = searchText;
        },
        async fetchAuthConfig() {
            this.fetchJson(this.authApiUrl() + "/config").then(config => {
                this.registrationDisabled = config?.registrationDisabled === true;
            });
        },
        onSearchClick(e) {
            this.submitSearch(e);
        },
        submitSearch(e) {
            e.target.blur();
            if (this.searchText) {
                this.$router.push({
                    name: "SearchResults",
                    query: { search_query: this.searchText },
                });
            } else {
                this.$router.push("/");
            }
            return;
        },
    },
};
</script>

<style>
.search-container {
    @apply relative inline-flex items-center;
}
.delete-search {
    @apply absolute right-3 cursor-pointer rounded-full bg-[#ccc] w-4 h-4 text-center text-black opacity-50 hover:(opacity-70) text-size-[10px];
}
.mobile-nav div {
    @apply mx-1;
}

#search-btn:hover {
    @apply bg-red-400;
}

.dark #search-btn:hover {
    @apply bg-dark-100;
}

.nav-link {
    @apply hover:text-red-500;
}

.dark .nav-link {
    @apply hover:text-red-400;
}

@media screen and (max-width: 848px) {
    #search-btn {
        display: none;
    }
}
</style>
